A device which controls the voltage and current being delivered to a capacitor or battery.

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29 views

Automatic Battery Charger Circuit. Not getting proper output

i have tried to make a circuit from electronics hub. but the LEDs in the circuit is not glowing. But the circuit is ok charging is doing well. Any problem with this circuit ? please help ?
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46 views

Solar panel - voltage regulator

I am contemplating the possibility to run a trolling motor (to push my canoe) with a 250W solar panel. Electrical Specifications: Peak power: 250 W (minus 0, plus 5W Tolerance!) Optimum operating ...
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0answers
55 views

Battery Charger

I am working in a industry where we have a battery bank connected with a battery charger in usually in charging mode but whenever black out occurs at that time by using battery we can provide a power ...
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1answer
29 views

Solar Charge Controller Function Details

I am planning to make this controller: I would like to understand the way the components work to switch from charging to dumping and vice versa at set points. Note that the 555 timer is not being ...
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1answer
24 views

Will the charging current decrease due to a higher input resistance?

I am trying to design a board with USB powered linear battery charger IC charging a 3.7v Li-ion battery. I am concerning about the the relationship between charging path resistance and the maximum ...
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1answer
124 views

What happens if you put the connector of a live charger in your mouth?

So what exactly would happen if you put the connector of a plugged-in charger in your mouth? I am sure it is a bad idea but can it really hurt or even kill you? Some posts on social media led me to ...
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0answers
26 views

Finish of charging

Is it possible to determine the fact charger has finished it's work (accumulator unplugged or charged) by any metrics in AC circuit? History of metrics is also available. Can this be resolved in ...
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2answers
43 views

Possible to charge a phone battery by using built in contacts? [closed]

Recently I had a Plum Coach Plus II handed down to me because a family member broke the charger port on the device. I managed to charge it after a few minutes of propping and plugging in the cable ...
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3answers
112 views

How to autoregulate a TP4056 for maximum solar power extraction

I'm using a solar panel (6V - 600mA at peak power) to charge a Li-Ion (3.7V) battery using a TP4065. The TP4065 I'm using has this configuration: Where the value of the resistor Rprog determines ...
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0answers
25 views

Creating a switch between USB and USB OTG for phones [duplicate]

I'm trying to create a charger that knows how to switch between OTG and charging mode. The OTG side is working, and my Samsung S4 goes into charging mode. However, charging is really slow. It even ...
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2answers
50 views

Do chargers use power when they're not charging? [duplicate]

1) If I connect my mobile charger to a wall socket and it is switched on, but I don't connect my mobile to the charger, does the charger still use electricity? 2) If I connect an extension box to a ...
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1answer
62 views

how can I hack a usb charger to work with ALL phones and specifications

perhaps I am asking for too much. Please do tell. So I have a few usb chargers laying around. I realised that in these chargers I can charge iPhones and I can ...
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1answer
47 views

What is “ol plug-it-in” as a charge approach?

I'm reading an article which is about wearable smart watches. In the following context author says Sony SmartWatch 3 uses ol' plug-it-in approach for charging, I ...
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0answers
77 views

Solar charge controller circuit for LiFePO4 (or possibly NiMH batteries)

Would someone happen to know of a circuit board for charging LiFePO4 batteries from solar panels. Or alternatively a simple circuit schematic for building one? I would like to use 2 LiFePO4 ...
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1answer
81 views

Li-ion 3s balancing charging using a TP4056 with protection OR use other charger and a protection

Trying to make a little powerpack for my boat with old 18650 cells. A am planning on a 1 kwh pack, so charging each cell indivually is not an option... I have planned to set up 10 packs of 4 ...
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0answers
25 views

Female USB charger in a car [duplicate]

I want to build a charger via USB in my car. I have a female USB but I want to know how to make this. I don't know how USB works for charging. I have also a cigar lighter in my car and a charger. ...
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1answer
85 views

Charging li-ion cell using constant-voltage only

Introduction Various resources [1] [2] state that the optimal method of charging a li-ion cell -- such as one found in a mobile phone -- is to charge at a constant current (usually <1C) until a ...
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1answer
70 views

How to Simply Lower Current in Circuit and Maintaining Voltage?

A charger with a transformer is putting out 12.6V and runs at 5A when I plug in the battery as the bat is fairly empty (10V of 12). I would like to limit the current to 2A. I tried a 5ohm 5 watt ...
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0answers
31 views

Grounding A Circuit of a Power Tool Battery Charger to Use as Car Battery Charger [duplicate]

I took a charger that matches what I need to charge a car battery. The charger uses a transformer and has 3 connections, as does the battery it's intended for (+/-/T). When I plug the + and - alone ...
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2answers
86 views

Modifying a Simple Transformer Circuit

I have a heavy 14.4V 1.5A heavy battery charger I would like to use to charge my car battery (over time, monitored for heat in a well ventilated area). When I plug the battery to the charger as is, ...
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1answer
91 views

USB charging at 4.3 volts

I'm trying to create a charger that knows how to switch between OTG and charging mode. The OTG side is working, and my Samsung S4 goes into charging mode. However, charging is really slow. It even ...
0
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1answer
63 views

Rewiring a 12V charger

I have a Windows tablet with a charger which crapped out. The old charger was 12V / 1.5A - fairly standard but it had a rare tiny pin connector. Rather than buy a new charger, I decided to cannibalise ...
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1answer
157 views

Best Option for Charging a High Voltage Capacitor?

I was looking for a good option to charge my 450V 6800uF Electrolytic Capacitors. I initially followed the dc - dc booster path with a voltage divider comparator (op-amp) something similar to But ...
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0answers
83 views

Smart Battery Charger with BQ24450

I am a newbie and need help in designing a smart battery charger with BQ24550 here are some details mentioned. Battery pack has 4 Lead Acid batteries (Panasonic LC-R064R5P) 6V 4.5Ah connected in ...
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0answers
49 views

Plugging battery backup and AC/DC converter into the same battery

Today, I took one of the UPS (UPS A) the battery out and directly plugged it to bigger 12V battery (so if the electricity is out it stays long). And I also have AC/DC 2000Watt inverter. That inverter ...
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1answer
110 views

SIM908 Li-Ion charging with 6V solar panel

So, I want to know if I can hook up a 6V 2 watt solar panel to the Vchg pin on a SIM908 gsm/gps module and trickle charge my 6Ah LiPo battery that way. A little background... So, I have completed ...
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0answers
72 views

Trying to create a USB dongle with OTG and charging capabilities

I'm trying to create a USB-OTG dongle that can pretty much do this: http://accessories.dell.com/sna/productdetail.aspx?c=us&cs=19&l=en&sku=470-abes That's the Dell Micro USB Dongle for ...
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1answer
98 views

How are these AA batteries 4500 mAh?

I found these two batteries in a drawer while looking for batteries for my wireless mouse. I was surprised to see that they are 4500 mAh, which is much higher than any AA battery I could find on the ...
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2answers
75 views

How does this wireless charger work?

I want to understand the way this circuit works. The following are diagrams of the transmitter and receiver of a wireless iPod charging circuit. I have added a link to the instructable that describes ...
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1answer
143 views

LM317 3.7 v battery charger

I have build simple LM317 power supply.Input is 12v (I am using computer power supply), and the output is around 4v .I was ...
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4answers
99 views

Circuit Validity

The following is a circuit I have tried simulating on multisim. The LED on the transmitter part does not light up. The current is 0 through that LED. Is it legitimate?
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1answer
108 views

Lost in desert - charge the phone with car battery [closed]

First of all I'm not a student nor a engineer. Pretend I'm lost in the desert with just a car with a broken engine. The battery of my phone is over. Is there any chance I can survive (charging the ...
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1answer
77 views

Power a laptop LED backlight with NiMH batteries

I'm powering a laptop LED backlight with an external 24,8V power supply, because I have problems with the internal WLED driver. The display used to work at 27V, but with the 24,8V of the power supply ...
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2answers
98 views

High Cell Count LiPo Balancer/Charger

How would I go about balance charging either 100 or 75 lipo cells? This is a very serious question by the way, it's for an electric vehicle and we use either 75 or 100 cells at a go and currently ...
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2answers
94 views

mobile battery charging using voltage regulator?

Circuit shown at http://www.instructables.com/id/9v-USB-charger/ will that satisfy all condition of mobile charging through usb ? what is advantage of circuit shown at ...
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1answer
647 views

Turn Laptop Battery to a Power Bank

Is it possible to turn a laptop battery into a power bank? I have seen video tutorials and articles on how to turn AA Batteries into power banks, however, no one has created a power bank using a ...
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1answer
96 views

We're making a bike-powered USB charger and we have (almost) no idea what we're doing

So my friend and I are going to build a USB charger powered by a dynamo. Here is a diagram of what we are planning to do. I have a few questions: 1.) How do we test if the dynamo and breadboard ...
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1answer
88 views

Need to make a laptop charger [closed]

I am not an electrician. My laptop's charger burned when we had high voltage 2 days ago. My laptops charger says Output is: 19.5 V and 9.23 A. I am in a country that you can't easily find those kinds ...
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2answers
126 views

5 volt generator

first time question, and not much of an electrical guy. so please be patient. My dad however, is an electrical engineer, who loves little goofy gadgets as most engineers do. For Christmas I want to ...
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1answer
96 views

Charge a Lipo battery and power a circuit

I purchased this LiPo charger and I plan to connect the GND and BAT connections to the battery and an external circuit at the same time. In the datasheet the reference drawings are for battery ...
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1answer
55 views

Charging appliances with chargers of different amperage (safety & duration)

Safety Will the battery or charger be damaged if I use a 1A charger to charge a 2.1A appliance? Will the battery or charger be damaged if I use a 2.1A charger to charge a 1A appliance? Duration I ...
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1answer
77 views

Identifying a four-pin IC labelled EL 8+7 G8025

I want to know the purpose of a component named "EL 8+7 G8025" which was found inside a Nokia charger.
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1answer
120 views

lm2596 fixed 5 volts(usb) from 12v 10W solar panel

I have got a 10 Watt solar panel & a 10000 mha Battery bank. I plan to use the panel to charge the battery bank. I have a LM2596(variable configuration with pot), I plan to use it to charge my ...
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1answer
74 views

Do AA battery chargers detect battery charge level and automatically turn off when full? [closed]

When I put in AA batteries for charging, do I have to remember to disconnect the charger after the specified number of hours, or does the charger detect the charge level and automatically turn off ...
1
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1answer
98 views

Why are 5 Volt 7-8 Amps chargers not available for charging phones quickly? [closed]

Available phone s chargers have either 0.5, 1, 2 Amps rating depending on the batteries (varied capacity) used. Why is it that 7, 8 Amps chargers are not available ? if the limitation is in the ...
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2answers
140 views

My voltage multiplier (cockroft-walton) will not charge my capacitor bank past 150v. How can I fix this?

I got 5 free 450v 4700uf capacitors that I put in parallel to form a 23500uf 450v capacitor bank (2.4kJ) in hopes of building a can crusher and later a railgun. I built a voltage tripler from four ...
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2answers
323 views

How does a USB 2.0 Wall Charger negotiate current output?

I'm trying to use a mobile phone charger for my projects, and want a high current output. I have read this, however my measurements show something else. Here is a link to the Battery Charging ...
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1answer
90 views

NiMH battery charger using discrete elements

Below is a schematic of NiMh battery charger that must automatically switch off charging current when battery is fully charged. I am aware that the main part of this scheme is current source, build ...
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2answers
140 views

Issue charging a 12V battery using solar charger

I bought a 12V solar charger for vehicle batteries, because I am usually using wall chargers and I wanted to give green technology a try. When I connect the solar charger to my battery, it shows 10V, ...
2
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1answer
532 views

How can I extend this circuit to use it in our real life?

I am planning to design a wireless mobile charger circuit next week. For that purpose, I have selected the circuit which is shown below and is collected from the post: wireless mobile battery charger. ...